Mechanical Properties

Among the various plastic films available, Lumirror™ features high tensile strength and is so tough that it cannot be ripped by hand, even with a thickness of 0.025 mm. Using thin materials, products can be made smaller, lighter, or be given higher performance.

1. Tensile Strength and Elongation for Various Product Numbers

Table 1 shoes the tensile strength and elongation for various Lumirror™ product numbers.
The measurement method is JIS C 2318-72.

Table 1. Tensile Strength and Elongation for Various Lumirror™ Product Numbers

Thickness		MD (Vertical)		TD (Horizontal)
		Tensile Strength	Tensile Elongation	Tensile Strength	Tensile Elongation
Product No.	μ	kg/mm2	%	kg/mm2	%
#6	6	20.0	130	24.0	90
#9	9	20.0	130	27.0	100
#12	12	22.0	140	26.0	120
#16	16	22.0	150	25.0	120
#25	25	21.0	160	25.0	130
#38	38	23.0	140	25.0	130
#50	50	22.0	150	22.0	130
#75	75	22.0	150	22.0	130
#100	100	21.5	150	21.0	130
#125	125	21.0	150	20.0	140
#188	188	19.0	190	19.0	140
#250	250	18.0	190	17.5	150
#350	350	16.0	190	15.0	160

2. Comparison of Tensile Strength and Elongation with Other Films

Among the various plastic films available, Lumirror™ has the highest tensile strength. Table 2 shows the tensile strength and elongation of various plastic films measured under the same conditions for the purpose of comparison.
The thickness of each sample measured was 25 μ, and the test conditions were 20°C and 65% RH.

Table 2. Tensile Strength and Elongation of Various Plastic Films

Film	Tensile Strength	Tensile Elongation
	kg/mm2	%
Lumirror™	24	130
TORAYFAN™ NO   *1	3 to 5	700
TORAYFAN™ BO   *2	19	130
High pressure polyethylene	2	300
Stretched polystyrene	10	10 to 20
Nylon 6	10	400
Stretched nylon 6	10 to 25	50 to 130
Stretched polycarbonate	10	150
Soft polyvinyl chloride	3 to 4	300
Hard polyvinyl chloride	5	30 to 130
Stretched hard polyvinyl chloride	12	80
Stretched vinyl chloride, vinylidene chloride copolymer	12	70
Hydrochloric acid rubber	10	130
Cellulose triacetate	12.5	40
Cellophane	12 to 20	15

• 1 Toray unstretched polypropylene film
• 2 Toray biaxially oriented polypropylene film

3. Changes in Tensile Strength and Elongation Due to Temperature

Changes in Lumirror™ tensile strength and elongation based on temperature are shown in Figures 1 and 2.
The thickness of each sample measured was #38 (38 μ) and the measurement method was JIS C 2318-72.

4. Change in Tensile Strength and Elongation Curve Based on Temperature

Lumirror™ retains excellent mechanical characteristics throughout a wide temperature range of -70 to +150°C. Fig. 3 shows the tensile strength and elongation curve for #38 (38 μ) Lumirror™ measured between the temperatures of -20 and +200°C.
The measurement method is JIS C 2318-72.

5. Comparison of Tensile Modulus with Other Films

Among the various plastic films available, Lumirror™ has the largest tensile modulus.
Table 3 shows the tensile modulus of various plastic films measured under the same conditions for the purpose of comparison.
The thickness of each sample measured was 25 μ, and the test conditions were 20°C and 65% RH.

6. Changes in Tensile Stress When Slightly Elongated Based on Temperature

Lumirror™'s tensile stress when it is elongated by just a small amount does not increase or change rapidly, as Lumirror™ normally has excellent cold resistance even at temperatures lower than room temperature.
However, one characteristic of thermoplastic resins is that they gradually weaken at temperatures higher than room temperature.
Fig. 4 shows the changes in #75 (75 μ) Lumirror™ tensile stress when elongated by 1%, 3%, and 5% based on temperature.
The measurement method is JIS C 2318-72.

7. Changes in Dynamic Characteristics Based on Temperature

Fig. 5 shows the dynamic tensile modulus and tan δ for #12 (12 μ) Lumirror™.

8. Creep Characteristics

Fig. 6 shows the creep characteristics for #188 (188 μ) Lumirror™ measured at a tension of 2 to 10 kg/mm². The width of the measured samples was 10 mm, the length was 1,000 mm, and the test conditions were 25°C and 65% RH.

9. End Tear Resistance for Various Product Numbers

Table 4 shows the end tear resistance for various Lumirror™ product numbers.
The measurement method is JIS C 2318-72.

10. Comparison of End Tear Resistance with Other Films

Among the various plastic films available, Lumirror™ has the highest end tear resistance. Table 2 shows the end tear resistance of various plastic films for the purpose of comparison. Values are all obtained with a thickness of 25 μ and the measurement method is JIS C 2318-72.

11. Rupture Strength for Various Product Numbers

Table 6 shows the rupture strength for various Lumirror™ product numbers.
The measurement method is JIS P8112-63.

12. Comparison of Rupture Strength with Other Films

Among the various plastic films available, Lumirror™ has the highest rupture strength.
Table 7 shows the rupture strength of various plastic films for the purpose of comparison.

13. Comparison of Impact Strength with Other Films

Among the various plastic films available, Lumirror™ has the highest impact strength.
Table 8 shows the impact strength of various plastic films for the purpose of comparison. The thickness of each measured sample was 25 μ, and the measurement method was the JIS K6745-72 falling ball method at 25°C.

14. Tear Propagation Resistance for Various Product Numbers

Table 9 shows the tear propagation resistance for various Lumirror™ product numbers.
The measurement method is JIS P8116-73.

15. Folding Endurance

Table 10 shows the folding endurance of Lumirror™ (number of times it can be folded).
The measurement method was JIS P8115-63 with the test performed at room temperature.

16. Bending Recovery Rate

The bending recovery rate of Lumirror™ was measured as follows.
A 10 mm wide × 60 mm long sample had a 275 g weight with a base of 30 mm × 40 mm placed on a spot 20 mm from the edge where the film was bent 180°. After one minute, the weight was removed and the recovery amount immediately after removal, as well as the recovery amount after one minute was measured.
The results of these measurements are shown in Table 11.

17. Friction Coefficient

Table 12 shows the friction coefficient of Lumirror™.
The measurement method is ASTM D 1894-63.

Lumirror™ Technical Information

• Mechanical Properties
• Physical and Thermal Properties
• Electrical Properties
• Chemical Properties